What is the meaning of Tympan?

A piece of cloth padding placed under the platen of a letterpress to distribute the pressure on the sheet being printed.

The stretched membrane of a drum.

A percussion instrument consisting of a hollow cylinder with such a membrane at each end.

A tympanum.

The tympanum of the ear.

eardrum

middle ear

tympanum

treadwheel, treadmill

hydraulic wheel

various percussion instruments, such as gongs, tympans, tambourines, etc.

tympan

Source: wiktionary.org